soniflex Lexicon
Die neusten Einträge
Threshold of pain
The threshold of pain (or: pain threshold) is the sound pressure level above which people perceive a sound event as being painful. For most people, the acoustic threshold of pain lies between 120 dB and 140 dB.
Mass law
Mass law or Berger’s law (see his doctoral thesis, 1911) describes the relationship between sound insulation effectivity, mass per unit area and sound frequency. According to this acoustic law, the sound insulation effect of a wall increases by 6 dB with each doubling of the wall's mass or of the sound's frequency.
Die meist gelesenen Einträge
Sound insulation
Sound insulation is the acoustic shielding of a room or device in order to prevent or reduce the transmission of air-borne or solid-borne sound to neighboring spaces. The aim is to prevent the sound from propagating by using sound insulation materials to build a sound barrier around the noise source.
Noise control
Equipping the room with noise control materials reduces the sound level (and hence the perceived noisiness) and improves speech intelligibility. Such an improvement of acoustic conditions makes for a much more pleasant atmosphere. Porous and fibrous materials such as open-cell foams or non-wovens are excellent sound absorbers. But also closed-cell foams with a special cell structure, for instance our soni RESIST, score with good sound absorption capacity.